64. The Maple Tree, by Sylvia Plimack Mangold. 1992. Linen, 38.1 by 50.8 cm. (Robert Ryman Collection; Exh. Museum of Fine Arts, Boston).
Attributed works:
65. 7 Properties of between (Installation with Richard Serra's Stacks), by Mel Bochner. 1971-72. Paper and Stone, Dimensions Variable (Exh. Yale University Art Gallery, New Haven, CT).